An incompressible fluid (kinematic viscosity, 7.4×10-7 m²/sec, specific gravity, 0.44) is held between two parallel plates. If the top plate is moved with a velocity of 0.5 m/s while the bottom one is held stationary, then fluid attains a linear velocity profile in the gap of 0.5 mm between these plates. The shear stress (in Pascals) on the surface of bottom plate is A 0.3256 N/m² 2 B 0.4256 N/m² C 0.5256 N/m² D 0.6256 N/m²

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.